3... c7c5 One option that Black has is to transpose to a Benoni or King's Indian Saemisch Variation. Incidentally, a question remains for those who are experts in opening nomenclature: when Black plays c5 in the King's Indian, should we call it a Benoni $2 4. d4d5  4... d7d6  5. b1c3  5... e7e6 